AD9783-EBZ datasheet(17/36 Pages) AD

17 / 36 page

AD9780/AD9781/AD9783

Rev. A | Page 17 of 36

TERMINOLOGY

Linearity Error or Integral Nonlinearity (INL)

Linearity error is defined as the maximum deviation of the

actual analog output from the ideal output, determined by a

straight line drawn from zero scale to full scale.

Differential Nonlinearity (DNL)

DNL is the measure of the variation in analog value, normalized

to full scale, associated with a 1 LSB change in digital input code.

Monotonicity

A DAC is monotonic if the output either increases or remains

constant as the digital input increases.

Offset Error

Offset error is the deviation of the output current from the ideal

of zero. For IOUTA, 0 mA output is expected when the inputs are

all 0s. For IOUTB, 0 mA output is expected when all inputs are

set to 1s.

Gain Error

Gain error is the difference between the actual and ideal output

span. The actual span is determined by the difference between

the output when all inputs are set to 1s and the output when all

inputs are set to 0s.

Output Compliance Range

Output compliance range is the range of allowable voltage at

the output of a current-output DAC. Operation beyond the

maximum compliance limits can cause either output stage

saturation or breakdown, resulting in nonlinear performance.

Temperature Drift

Temperature drift is specified as the maximum change from

the ambient (25°C) value to the value at either TMIN or TMAX.

For offset and gain drift, the drift is reported in ppm of full-

scale range (FSR) per degree Celsius. For reference drift, the

drift is reported in ppm per degree Celsius.

Power Supply Rejection

Power supply rejection is the maximum change in the full-scale

output as the supplies are varied from minimum to maximum

specified voltages.

Settling Time

Settling time is the time required for the output to reach and

remain within a specified error band around its final value,

measured from the start of the output transition.

Spurious-Free Dynamic Range (SFDR)

SFDR is the difference, in decibels, between the peak amplitude

of the output signal and the peak spurious signal between dc

and the frequency equal to half the input data rate.

Total Harmonic Distortion (THD)

THD is the ratio of the rms sum of the first six harmonic com-

ponents to the rms value of the measured fundamental. It is

expressed as a percentage or in decibels.

Signal-to-Noise Ratio (SNR)

SNR is the ratio of the rms value of the measured output signal

to the rms sum of all other spectral components below the Nyquist

frequency, excluding the first six harmonics and dc. The value

for SNR is expressed in decibels.

Adjacent Channel Leakage Ratio (ACLR)

ACLR is the ratio in dBc between the measured power within a

channel relative to its adjacent channel.

Complex Image Rejection

In a traditional two-part upconversion, two images are created

around the second IF frequency. These images usually waste

transmitter power and system bandwidth. By placing the real

part of a second complex modulator in series with the first

complex modulator, either the upper or lower frequency image

near the second IF can be rejected.

AD9783-EBZ датащи(PDF) 17 Page - Analog Devices

AD9783-EBZ датащи(HTML) 17 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

датащи скачать

ссылки URL